
I can probably answer most questions you may have -I bred, showed and judged for many, many years, international judge, founder member of both Swedish Hamster Society and British Hamster Association (now no longer in existence), had 3 books on hamsters published etc. I have kept Syrians, Chinese, Russian Campbell, Russian Winter White and Roborovski. I am not aware of any forums but there are mailing lists, the ones I am aware of are not active at all any more but if you look for club based mailing lists (National Hamster Council and its affiliated regional clubs such as Southern Hamster Club, Northern HC, Midland HC) they may be more active but will of course mainly be about breeding and showing.
This is the NHC website:
http://www.hamsters-uk.org/This website has decent info, it started out as an independent hamster site done by a fancier and was then bought by the Pet Web Site:
http://www.petwebsite.com/hamsters.asp